I decided to try out a sort of full body workout targeting my chest and back after my leg workouts last week. I did the same workouts i do on my chest/back and leg days, but for some reason i was not sore at all so i tried it again in the same week and same thing. I'm shocked because my legs and core would be extremely sore after my leg workouts. After doing some research i found out that lactic acid build up was one of the culprits of doms pain, and my theory is that transitioning from lower body to upper body in the same workout might actually lower the lactic acid in the legs and delaying the pain.